CN112127859B - Two-way flow control valves, water control screens and completion strings - Google Patents
Two-way flow control valves, water control screens and completion strings Download PDFInfo
- Publication number
- CN112127859B CN112127859B CN202011206348.8A CN202011206348A CN112127859B CN 112127859 B CN112127859 B CN 112127859B CN 202011206348 A CN202011206348 A CN 202011206348A CN 112127859 B CN112127859 B CN 112127859B
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- valve
- water control
- disc spring
- nozzle plate
- plate
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 2
- 230000002457 bidirectional effect Effects 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003129 oil well Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000010618 wire wrap Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Lift Valve (AREA)
Abstract
本发明涉及一种双向控流阀、控水筛管以及完井管串，双向控流阀包括安装阀座、碟簧、喷嘴片、以及阀片，其中，安装阀座包括阀头以及从阀头延伸而突出的阀柱，阀柱形成有空腔，阀头的周缘侧壁上形成有与所述空腔相连通的多个通道，阀头的内部中央处形成有环形突起，所述多个通道穿过环形突起从而与碟簧的中心通道相连通；喷嘴片形成有中心通孔并且上部形成为圆台状；阀片的上表面中心处形成有凹槽，在凹槽中形成有至少一个阀片通孔；所述碟簧、喷嘴片以及阀片由上而下依次设置在空腔121中，其中环形突起与碟簧的上端锥面接触，喷嘴片的上表面与碟簧的下端锥面接触，阀片设置在阀柱的空腔中。
The present invention relates to a two-way flow control valve, a water control screen pipe and a completion pipe string, wherein the two-way flow control valve comprises an installation valve seat, a disc spring, a nozzle plate and a valve plate, wherein the installation valve seat comprises a valve head and a valve column extending and protruding from the valve head, the valve column forms a cavity, a plurality of channels connected to the cavity are formed on the peripheral side wall of the valve head, an annular protrusion is formed at the inner center of the valve head, the plurality of channels pass through the annular protrusion and are connected to the central channel of the disc spring; the nozzle plate forms a central through hole and the upper part is formed in a truncated cone shape; a groove is formed at the center of the upper surface of the valve plate, and at least one valve plate through hole is formed in the groove; the disc spring, the nozzle plate and the valve plate are arranged in the cavity 121 in sequence from top to bottom, wherein the annular protrusion contacts the upper end conical surface of the disc spring, the upper surface of the nozzle plate contacts the lower end conical surface of the disc spring, and the valve plate is arranged in the cavity of the valve column.
Description
Technical Field
The application relates to the technical field of oil and gas exploitation, in particular to a bidirectional flow control valve, a water control screen pipe and a well completion pipe string.
Background
In the later period of oil exploitation, the pressure of an oil reservoir is reduced, the oil yield is reduced, and the oil yield is often improved by adopting technologies such as secondary water injection and gas injection. However, the adoption of the techniques also causes problems, such as secondary water injection and gas injection exploitation, low water ridge inflow and the like, the water content in the produced liquid gradually increases, and the water content of some oil wells reaches more than 98%, so that the exploitation value is lost.
In the water injection and oil production technology, a water control valve is generally adopted to limit the flow of oil-water liquid from an oil well, and limit the production liquid with different viscosities, so that the water injection and oil production technology is one of key devices for controlling the water output from the oil well. However, the water control valves in the prior art are generally unidirectional water control, water control and throttling and oil increasing effects are poor.
Accordingly, new techniques and equipment are needed to at least partially eliminate the problems of the prior art.
Disclosure of Invention
The purpose of the invention is that: the equipment in the prior art is improved to limit the output of water in the production liquid of the oil-water well, improve the comprehensive oil content ratio of the oil well and reduce the oil extraction cost.
To this end, according to an aspect of the present invention, there is provided a bidirectional flow control valve (71) characterized by comprising a mounting valve seat (10), a disc spring (20), a nozzle plate (30), and a valve plate (40),
Wherein the mounting valve seat (10) comprises a valve head (11) and a valve stem (12) extending from the valve head and protruding, the valve stem (12) is formed with a cavity (121), a plurality of channels (111) communicated with the cavity (121) are formed on the peripheral side wall of the valve head (11), an annular protrusion (112) is formed at the inner center of the valve head (11), and the channels (111) penetrate through the annular protrusion (112) so as to be communicated with the central channel of the disc spring (20);
the nozzle sheet (30) is formed with a central through hole (31) and the upper part is formed in a truncated cone shape;
A groove (41) is formed in the center of the upper surface of the valve plate (40), and at least one valve plate through hole (42) is formed in the groove;
the disc spring (20), the nozzle plate (30) and the valve plate (40) are sequentially arranged in the cavity 121 from top to bottom, wherein the annular protrusion (112) is in conical surface contact with the upper end of the disc spring (20), the upper surface of the nozzle plate (30) is in conical surface contact with the lower end of the disc spring (20), and the valve plate (40) is arranged in the cavity (121) of the valve column (12).
Preferably, the valve plate (40) is arranged in the cavity (121) in a fixed or movable manner, for example, can float up and down, for example, can be fixedly connected with the cavity (121) by threads.
Preferably, a plurality of protrusions (1211) and a plurality of bosses (1212) are formed in the cavity (121) to surround the disc spring (20) and the nozzle plate (30), respectively, to restrict horizontal movement of the disc spring (20) and the nozzle plate (30), respectively.
Preferably, the spool (12) has threads formed on its outer surface.
Preferably, the mounting valve seat (10), the disc spring (20), the nozzle plate (30) and the valve plate (40) are made of high-strength metal materials with abrasion resistance and erosion resistance.
According to another aspect of the present invention, there is provided a water control screen comprising a base pipe (50), a filter jacket (60) and a water control unit (70),
Wherein the water control unit (70) comprises at least one bidirectional flow control valve (71) according to the invention and a water control jacket (72); the water control jacket (72) and the filter jacket (60) are adjacently arranged on the periphery of the base pipe (50), and the adjacent ends of the water control jacket and the filter jacket are in sealing connection through an intermediate sealing ring (73); an interface (51) is formed on a base pipe (50) covered by the water control jacket (72), and a bidirectional flow control valve (71) is fixedly connected with the interface;
the other end of the water control jacket (72) is fixed on the base pipe (50) in a sealing way through a water control side end ring (74), and the other end of the filter jacket (60) is fixed on the base pipe (50) in a sealing way through a filter side end ring (61), so that fluid in the external environment can enter a space between the water control jacket (72) and the base pipe (50) through the filter jacket (60) and then enter the base pipe (50) through a bidirectional flow control valve (71), or fluid in the base pipe (50) can enter a space between the water control jacket (72) and the base pipe (50) through the bidirectional flow control valve (71) and then enter the external environment through the filter jacket (60).
Preferably, the two-way flow control valve (71) is fixedly connected to the port (51) by means of threads or welding.
Preferably, the filter sleeve (60) is a precision wire wrap sleeve, a precision slit sleeve or other type of filter sleeve.
Preferably, the base pipe (50) is an API oil casing.
According to one aspect of the invention, a completion string is provided comprising a plurality of water control screens according to the invention connected in series.
According to the water control valve, bidirectional circulation can be realized, the disc spring (20) and the nozzle plate (30) are movably arranged in the mounting valve seat (10), different flow rates can be realized according to the direction of fluid, and therefore good water control throttling and oil increasing effects are realized.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of a two-way flow control valve according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a two-way flow control valve according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a mounting valve seat according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of a nozzle plate according to an embodiment of the present invention
FIG. 5 is a schematic view of a water control screen according to an embodiment of the present invention;
Fig. 6 is a schematic structural view of a completion string according to an embodiment of the present invention.
Detailed Description
The invention will be better understood from the following examples. However, it will be readily appreciated by those skilled in the art that the description of the embodiments is provided for illustration only and should not limit the invention as described in detail in the claims.
Referring to FIGS. 1-4, the bi-directional flow control valve 71 of the present invention can include a mounting valve seat 10, a disc spring 20, a nozzle plate 30, and a valve plate 40.
As shown in fig. 1 to 3, the mounting valve seat 10 includes a valve head 11 and a spool 12 extending therefrom, the spool 12 being formed to be hollow, i.e., having a cavity 121 formed therein, a plurality of passages 111 communicating with the cavity 121 being formed on a peripheral side wall of the valve head 11, an annular protrusion 112 being formed at an inner center of the valve head 11, the plurality of passages 111 passing through the annular protrusion 112 so as to communicate with a space in the annular protrusion 112, and thereby being capable of communicating with a central passage of the disc spring 20. The outer surface of the spool 12 may be threaded for connection to other components.
The disc spring 20 may be formed of a plurality of pieces connected in series, and thus may be formed with an upper end tapered surface and a lower end tapered surface. A disc spring is disposed in the cavity 121 adjacent to the annular projection 112 such that the annular projection abuts against an upper end taper (e.g., a convex taper or a concave taper). In order to restrain the disc spring 20 from moving in the horizontal direction, a plurality of protrusions 1211 may be formed on the inner wall of the cavity 121 to substantially surround the disc spring 20 for restraining the disc spring 20 in the horizontal direction.
Referring to fig. 1 to 4, a nozzle plate 30 is provided at the lower portion of the disc spring 20, and the upper portion of the nozzle plate 30 is formed in a truncated cone shape, thereby having an inclined conical surface, and a center through hole 31 is formed therein. The upper surface of the nozzle plate 30 contacts the lower end tapered surface (e.g., concave tapered surface) of the disc spring 20, and the center through hole 31 communicates with the center passage of the disc spring 20 and thus with the plurality of passages 111. The diameter of the nozzle plate 30 as a whole may be slightly larger than the diameter of the disc spring 20, but the diameter of the upper surface of its upper truncated cone is smaller than the diameter of the disc spring 20, whereby the protrusions 1211 do not interfere with the truncated cone against the lower surface of the disc spring 20. Also, in order to restrain the movement of the nozzle plate 30 in the horizontal direction, a plurality of bosses 1212 substantially surrounding the nozzle plate 30 may be formed on the inner wall of the cavity 121 for restraining the nozzle plate 30 in the horizontal direction.
In the above-described structure, the annular protrusion 112 is in contact with the upper end tapered surface of the disc spring 20, while the upper surface of the nozzle plate 30 is in contact with the lower end tapered surface of the disc spring 20, and the protrusion 1211 and the boss 1212 are combined, whereby the disc spring 20 and the nozzle plate 30 can be stably disposed in the cavity 121.
The valve plate 40 is disposed in the cavity 121 and below the nozzle plate 30. The center of the upper surface of the valve plate 40 is formed with a groove 41, in which at least one valve plate through hole 42 penetrating the valve plate 40 is formed, four are shown in the figure, and of course, the number and arrangement can be specifically set as required. The diameter of the valve plate 40 may be slightly larger than the diameter of the nozzle plate 30, substantially in line with the inner diameter of the cavity 121, which may be in close proximity to the nozzle plate 30 or at a distance; the valve plate may be fixedly connected to the cavity 121 by, for example, threads, or may be movably (e.g., vertically floating) disposed in the cavity 41, and the mounting valve seat 10 may further include a valve cover (not shown) which is sleeved on the valve stem 12 by, for example, screwing, and the lower surface of the valve plate 40 abuts against the valve cover, and the valve cover is provided with a through hole opposite to the valve plate through hole 42.
As described above, in the present invention, the disc spring 20, the nozzle plate 30 and the valve plate 40 are disposed in the cavity 121 in this order from top to bottom. In a normal state, the annular protrusion 112 is in contact with the upper end taper surface of the disc spring 20, the upper surface of the nozzle plate 30 is in contact with the lower end taper surface of the disc spring 20, and the valve plate 40 is fixedly disposed in the cavity 121 of the spool 12 and the upper surface thereof is in contact with the lower surface of the nozzle plate 30. At this time, the disc spring 20 may be in a normal non-compressed state or a slightly compressed state such that the upper surface of the valve sheet 40 is in close contact with the lower surface of the nozzle sheet 30 or a certain gap is maintained.
Fluid, such as water or oil, may flow in through the plurality of channels 111 (assuming a forward flow), into the central channel of the disc spring 20, then through the central through hole 31 of the nozzle plate 30 into the recess 41 of the valve plate 40, and out through the valve plate through hole 42; or a fluid such as water or oil may flow in through the valve plate through-hole 42 (assuming reverse flow) and then enter the groove 41 of the valve plate 40, at which time, since the flow amount of the central through-hole 31 of the nozzle plate 30 is relatively small, the fluid generates pressure to the nozzle plate 30, so that the nozzle plate 30 is out of contact with the valve plate 40 and presses the disc spring 20, whereby a part of the fluid flows into the central passage of the disc spring 20 through the central through-hole 31 and then flows out through the above-mentioned passages 111, and at the same time, a part of the fluid enters the central passage of the disc spring 20 through the gaps between the disc spring 20 and the inner wall of the cavity 121 and the gaps between the disc springs and then flows out through the above-mentioned passages 111. It can be seen that the bi-directional flow control valve 71 of the present invention is capable of achieving bi-directional flow in both the forward and reverse directions and that the flow rate in the reverse direction may be greater than the flow rate in the forward direction. For example, when the pressure between the valve plate 40 and the nozzle plate 30 is greater than the upper chamber, the nozzle plate 30 is pushed and the disc spring is compressed, and most of the back-filled liquid can flow out of the valve body hole 111 upward through the outer ring space of the nozzle plate.
The mounting valve seat 10, disc spring 20, nozzle plate 30 and valve plate 40 may be made of a high strength metal material that is resistant to abrasion and erosion, such as an alloy material.
Fig. 5 is a schematic structural view of a water control screen according to an embodiment of the present invention, and referring to fig. 5, the water control screen 100 may include a base pipe 50, a filter housing 60, and a water control unit 70. The base pipe may be, for example, an API oil sleeve, with an interface 51 formed thereon for fixedly connecting the two-way flow control valve 71, the interface may be connected by, for example, threads on the outer surface of the spool 12, or may be connected by welding. After being fixed, the valve plate 40 of the two-way flow control valve 71 faces the inside of the base pipe 50, and the valve head 11 is outside the base pipe 50.
The water control unit 70 may include at least one bi-directional flow control valve 71 and a water control jacket 72; the water control jacket 72 is nested around the outer periphery of the base pipe 50 with the two-way flow control valve 71 formed therein, and a space is formed therebetween in which the valve head 11 of the two-way flow control valve 71 is located. One end of the water control jacket 72 is sealingly fastened to the base pipe 50 by means of a water control side end ring 74, and the other end thereof is sealingly connected to the filter jacket 60 by means of an intermediate sealing ring 73, i.e. the water control jacket 72 is arranged adjacent to the filter jacket 60 at the outer periphery of said base pipe 50.
The water control jacket 72 may be a precision wire winding jacket or a precision seam punching jacket, or other suitable filter jackets, etc., and is nested on the base pipe, the other end of the water control jacket is fixed on the base pipe 50 in a sealing way through the water control side end ring 74, and the fluid outside the pipe can enter the space between the water control jacket 72 and the base pipe after being filtered by the filter jackets, then enter the space between the water control jacket 72 and the base pipe 50, and enter the base pipe 50 through the bidirectional flow control valve 71; conversely, fluid in base pipe 50 may also enter the space between water control jacket 72 and base pipe 50 through bi-directional flow control valve 71 and then enter the external environment through filter sleeve 60.
It should be appreciated that the techniques for sealing connection between the sleeves, between the sleeves and the tubes are well known in the art and are not described in detail herein.
Fig. 6 is a schematic structural view of a completion string according to an embodiment of the present invention, referring to fig. 6, the completion string may comprise a plurality of water control screen pipes 100 according to the present invention connected in series. The water control screen pipes 100 are connected in series in a sealing way through the packer 90 and then connected to the oil pipe, the end part of the completion pipe string can be provided with a guide shoe, and the other end of the completion pipe string is fixed through a hanger, so that the completion pipe string is formed. The water control screen pipe well completion pipe string can seal or fill the stratum production layer annulus in a sectional manner, and the water control valve is installed in a sectional manner to realize sectional oil extraction, so that the oil increasing and water control effects can be improved.
Specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the invention is that the above basic scheme, it is not necessary for a person skilled in the art to design various modified models, formulas, parameters according to the teaching of the invention to take creative effort. Variations, modifications, substitutions and alterations are also possible in the embodiments without departing from the principles and spirit of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206348.8A CN112127859B (en) | 2020-11-02 | 2020-11-02 | Two-way flow control valves, water control screens and completion strings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011206348.8A CN112127859B (en) | 2020-11-02 | 2020-11-02 | Two-way flow control valves, water control screens and completion strings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112127859A CN112127859A (en) | 2020-12-25 |
| CN112127859B true CN112127859B (en) | 2024-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011206348.8A Active CN112127859B (en) | 2020-11-02 | 2020-11-02 | Two-way flow control valves, water control screens and completion strings |
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| Country | Link |
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| CN (1) | CN112127859B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878967A (en) * | 2021-02-26 | 2021-06-01 | 中国海洋石油集团有限公司 | Water control sieve tube |
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| CN112127859A (en) | 2020-12-25 |
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